Sorry, Fred. That won't work. The series resistor is just to raise the effective Qts of the driver up to the level needed for a Voigt Pipe. The BSC step filter comes after that.My personal dislike for the Voigt pipe is well known, particularly the Lowther Club of Norway TQWT that one of the links is really pointing at. But if you must, use the FE207E rather than the FE206E. You will have a much better chance as a decent sound.
Bob